CN107985058A - A kind of hybrid power coupling mechanism, control system and method - Google Patents

Abstract

The invention discloses a kind of hybrid power coupling mechanism, and it includes two motors, two planet rows and axis tooth system.Wherein, engine is connected with the planet carrier of the first planet row, and generator is connected with the sun gear of the first planet row, and a brake and clutch are provided with the first planet row, passes through reasonable control brake and clutch, it is possible to achieve increases journey drive pattern.Driving motor is connected by gear pair with the sun gear of the second planet row, and the planet carrier of the second planet row is fixed, the ring gear output of the second planet row.The invention also discloses corresponding control system and method；Implement the embodiment of the present invention, it is possible to achieve electric-only mode, increase the multiple drive modes such as journey drive pattern, hybrid mode, and need to only arrange three axis, compact-sized, reduces the requirement to space.

Description

A hybrid coupling mechanism, control system and method

technical field

The invention relates to the field of hybrid electric vehicles, in particular to a hybrid coupling mechanism, a control system and a method.

Background technique

The powertrain consists of the engine (internal combustion engine) and a drive train consisting of a transmission, differential and drive shaft. Its function is to provide the vehicle with the driving power required to drive the wheels. Internal combustion engines have a range of speeds and torques, and they work best within a small range where either fuel consumption is minimized, harmful emissions are minimized, or both. However, the actual road conditions are ever-changing, not only in the speed of the driving wheels, but also in the torque required by the driving wheels. Therefore, it is the primary task of the transmission to realize the optimal speed and torque of the internal combustion engine, that is, the optimal state of power, and a good match with the power state of the drive wheel.

In recent years, the birth of electric motor hybrid technology has opened up a new way to realize the complete matching of power between the internal combustion engine and the power wheel. Among the many powertrain designs, the most representative ones are series hybrid system and parallel hybrid system. In the motor series hybrid system, the internal combustion engine-generator-motor-shaft system-drive wheel forms a series power chain, and the powertrain structure is extremely simple. Among them, the generator-motor combination can be regarded as a transmission in the traditional sense. When used in conjunction with energy storage devices such as batteries and capacitors, the transmission can be used as an energy regulation device to complete independent regulation of speed and torque.

The motor parallel system has two parallel independent power chains. One consists of a traditional mechanical transmission and the other consists of an electric motor-battery system. The mechanical transmission is responsible for regulating the speed, while the motor-battery system completes the regulation of power or torque. In order to give full play to the potential of the entire system, the mechanical transmission also needs to adopt a continuously variable speed change method.

The advantage of the series hybrid system lies in its simple structure and flexible layout. But there are also some disadvantages. Since all the power passes through the generator and the motor, the motor has high power requirements, large volume and heavy weight. At the same time, since the energy transmission process undergoes two electromechanical and electromechanical conversions, the efficiency of the entire system is low. In a parallel hybrid system, only part of the power is passed through the motor system, so the power requirement for the motor is relatively low, but the overall system efficiency is high. However, this system requires two independent subsystems, which is expensive and usually only used in weak hybrid systems.

There are also some electromechanical coupling schemes, such as the electromechanical coupling scheme of Toyota Prius, which includes a planetary gear mechanism, which can realize pure electric, hybrid drive and other working modes through reasonable control of related power sources. However, in the existing scheme, it belongs to the four-axis system, including the engine input shaft, the intermediate shaft, the drive motor input shaft and the differential shaft. It has many shaft systems, is not compact enough, and has high requirements for space layout. .

Contents of the invention

The technical problem to be solved by the present invention is to provide a hybrid coupling mechanism, control system and method, which can automatically switch the driving mode, and only need to arrange three axes, with a compact structure and reduced space requirements.

In order to solve the above technical problems, an aspect of the embodiments of the present invention provides a hybrid coupling mechanism for driving a hybrid vehicle, including:

engine;

a shock absorber connected to the output shaft of said engine;

a generator arranged coaxially with said engine;

The first planetary row is used to connect the engine and the generator, and the first planetary row includes a first sun gear, a first planetary carrier and a first ring gear; wherein, the engine and the first planetary carrier connected, the generator is connected to the first sun gear;

a brake connected to the first ring gear of the first planetary row;

The clutch is arranged on the input shaft of the generator, and the brake and the clutch are used for working mode switching;

The second planetary row includes a second sun gear, a second planetary carrier and a second inner ring gear, wherein the second planetary carrier is fixed, and the second sun gear is connected to the first inner gear of the first planetary row ring meshing;

A drive motor, the input end of which is connected to the power battery, and the output end of which is connected to the second sun gear of the second planetary row through the drive motor gear;

The differential gear is connected with the second ring gear of the second planetary row and connected with the wheel axle.

Wherein, when braking is required, the drive motor is further used to generate braking torque to brake the wheels, and can generate induced current to charge the power battery.

Wherein, the working mode includes pure electric driving mode, hybrid driving mode and extended range driving mode; wherein, when the brake is disconnected, the hybrid power coupling mechanism is in pure electric driving mode or hybrid driving mode; when the When the brake is engaged and the clutch is disengaged, the hybrid coupling mechanism is in the extended-range driving mode.

Correspondingly, another aspect of the embodiments of the present invention also provides a hybrid power coupling control system for driving a hybrid electric vehicle, including a hybrid power coupling mechanism and a mode control device, wherein:

The hybrid coupling mechanism includes:

engine;

a shock absorber connected to the output shaft of said engine;

a generator arranged coaxially with said engine;

The first planetary row is used to connect the engine and the generator, and the first planetary row includes a first sun gear, a first planetary carrier and a first ring gear; wherein, the engine and the first planetary carrier connected, the generator is connected to the first sun gear;

a brake connected to the first ring gear of the first planetary row;

The clutch is arranged on the input shaft of the generator, and the brake and the clutch are used for working mode switching;

The second planetary row includes a second sun gear, a second planetary carrier and a second inner ring gear, wherein the second planetary carrier is fixed, and the second sun gear is connected to the first inner gear of the first planetary row ring meshing;

A drive motor, the input end of which is connected to the power battery, and the output end of which is connected to the second sun gear of the second planetary row through the drive motor gear;

a differential, connected to the second ring gear of the second planetary row, and connected to the wheel axle;

The mode control device is used to determine the working mode of the hybrid power coupling mechanism according to the state of the brake, the clutch, the current battery SOC value or/and the current vehicle speed, and switch the hybrid power coupling mechanism to the determined working mode mode, the working mode includes a pure electric drive mode and a hybrid drive mode.

Wherein, the mode control device further includes:

A comparing unit, configured to compare the current battery SOC value with a first threshold, or/and compare the current speed of the vehicle with a second threshold;

A working mode determining unit, configured to determine the working mode of the hybrid power coupling control system according to the state of the brake and the clutch and the comparison result of the comparing unit;

The working mode execution unit is configured to control the closure or position of each element in the hybrid power coupling control system according to the working mode determined by the working mode determining unit, so as to switch the hybrid power coupling mechanism to the working mode.

Wherein, the working mode execution unit specifically adopts the following method to switch working modes:

When the determined working mode is the pure electric driving mode, control the engine and the generator to shut down, control the driving motor to work, and output driving force to the wheels;

When the determined working mode is a hybrid drive mode, control the engine, the generator, and the driving motor to work, so that the engine and the driving motor jointly output driving force to the wheels;

When the determined working mode is the extended-range drive mode, control the engine to start, output the power of the engine to the generator to generate electricity, and charge the power battery; control the drive motor to output drive force to the wheels .

Wherein, the mode control device further includes a braking mode processing unit, which is used to control the engine to shut down when the vehicle is in a braking state, and control the drive motor to generate a braking torque to brake the wheels, and at the same time collect the The induced current generated in the drive motor is used to charge the power battery.

Correspondingly, another aspect of the embodiments of the present invention further provides a hybrid power coupling control method, which is applied to the aforementioned hybrid power coupling control system, including the following steps:

Step S10, determine the working mode of the hybrid coupling mechanism according to the state of the brake, the clutch, the current battery SOC value or/and the current vehicle speed, and the working mode includes pure electric driving mode, extended range driving mode and hybrid driving mode;

Step S11, switching the hybrid coupling mechanism to the determined working mode.

Wherein, the step S10 further includes:

Step S100, comparing the current battery SOC value with a first threshold, or/and comparing the current speed of the vehicle with a second threshold;

Step S101, determining the working mode of the hybrid coupling control system according to the state of the brake and the clutch and the comparison result;

Step S102, according to the determined working mode, control the closure or position of each component in the hybrid power coupling control system, so that the hybrid power coupling mechanism is switched to the working mode.

Wherein, the step S102 includes:

When the determined working mode is the pure electric driving mode, control the engine and the generator to shut down, control the driving motor to work, and output driving force to the wheels;

When the determined working mode is a hybrid drive mode, control the engine, the generator, and the driving motor to work, so that the engine and the driving motor jointly output driving force to the wheels;

When the determined working mode is the extended-range driving mode, control the engine to start, output the power of the engine to the generator to generate electricity, and charge the power battery; control the driving motor to output driving force to the wheels.

Wherein, the method further includes:

When the vehicle is in a braking state, control the engine to shut down, control the driving motor to generate braking torque to brake the wheels, and collect the induced current generated in the driving motor to charge the power battery.

Implementing the embodiment of the present invention has the following beneficial effects:

In the hybrid coupling mechanism provided by the embodiment of the present invention, the engine and the generator are connected through a planetary gear, the speed ratio is adjustable, and the speed ratio range is large, which can reduce the volume of the generator; the drive motor is connected and output through a planetary gear, which can increase The speed ratio of the drive motor is conducive to the high speed of the motor, so that the volume of the motor can be reduced, which is conducive to saving space and light weight;

At the same time, in the hybrid mode, the speed can be adjusted through the planetary gear mechanism to optimize the working range of the engine and improve the economic performance of the engine;

In addition, during the mode switching process, the drive motor participates in the drive, and there is no power interruption in the power;

Furthermore, in the embodiment of the present invention, only three shaft systems are required, and the structure is compact; and the driving motor can generate braking torque, so in the embodiment of the present invention, the structure is simple, the control is easy, and the cost is low.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of an embodiment of a hybrid coupling mechanism provided by the present invention;

Fig. 2 is a schematic structural diagram of a mode control device in a hybrid power coupling control system provided by the present invention;

Fig. 3 is a structural schematic diagram of a hybrid power coupling control system in a pure electric driving mode provided by the present invention;

Fig. 4 is a structural principle diagram in a hybrid driving mode in a hybrid power coupling control system provided by the present invention;

Fig. 5 is a structural schematic diagram of a hybrid power coupling control system in the range-extending drive mode provided by the present invention;

Fig. 6 is a schematic diagram of the main flow of an embodiment of a hybrid power coupling control method provided by the present invention;

FIG. 7 is a more detailed flowchart of step S10 in FIG. 6 .

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the structures and/or processing steps closely related to the solution according to the present invention are shown in the drawings, and the related Other details are not relevant to the invention.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the structures and/or processing steps closely related to the solution according to the present invention are shown in the drawings, and the related Other details are not relevant to the invention.

As shown in Figure 1, it shows a schematic structural view of an embodiment of a hybrid coupling mechanism provided by the present invention; in this embodiment, the hybrid coupling mechanism is used for driving a hybrid electric vehicle, specifically, It can be applied to a plug-in hybrid electric vehicle (PHEV) or a hybrid electric vehicle (HEV), and the hybrid coupling mechanism includes:

engine 1;

The shock absorber 2 is connected to the output shaft of the engine 1;

A generator 6, which is arranged coaxially with the engine 1;

The first planetary row is used to connect the engine 1 and the generator 6, the first planetary row includes the first sun gear 3, the first planet carrier 4 and the first ring gear 5; wherein, the engine 1 and the generator 6 The first planet carrier 4 is connected, and the generator 6 is connected to the first sun gear 3;

The brake 13 is connected with the first ring gear 5 of the first planetary row;

The clutch 14 is arranged on the input shaft of the generator 6, and the brake 13 and the clutch 14 are used for working mode switching;

The second planetary row includes a second sun gear 7, a second planetary carrier 8 and a second ring gear 9, wherein the second planetary carrier 8 is fixed, and the second sun gear 7 and the first planetary row The first ring gear 5 meshes with each other;

Drive motor 10, its input end is connected with power battery, and its output end is connected with the second sun gear 7 of described second planetary row through drive motor gear 11;

The differential 12 is connected with the second ring gear 12 of the second planetary row, and is connected with the axle 15 of the wheel 16 .

Wherein, when braking is required, the drive motor 10 is further used to generate braking torque to brake the wheels, and can generate induced current to charge the power battery. In this embodiment, no separate brake is required.

Wherein, the working mode includes pure electric driving mode, hybrid driving mode and extended range driving mode; wherein, when the brake 13 is disconnected, the hybrid power coupling mechanism is in pure electric driving mode or hybrid driving mode; when the When the brake 13 is engaged and the clutch 14 is disengaged, the hybrid coupling mechanism is in the range-extending driving mode.

Correspondingly, an embodiment of the present invention also provides a hybrid power coupling control system for driving a hybrid electric vehicle, which includes the hybrid power coupling mechanism shown in FIG. 1 and the mode control device 20, wherein the mode control The device 20 is used to determine the working mode of the hybrid power coupling mechanism according to the state of the brake 13, the clutch 14, the current battery SOC value or/and the current vehicle speed, and switch the hybrid power coupling mechanism to the determined working mode, The working modes include pure electric driving mode and hybrid driving mode.

Specifically, as shown in FIG. 2, in one embodiment, the mode control device 20 further includes:

The comparison unit 200 is used to compare the current battery SOC value with the first threshold, or/and compare the current speed of the vehicle with the second threshold; it can be understood that the first threshold is used to judge the level of the battery SOC value, and the second The two thresholds are used to judge the speed of the vehicle. This embodiment does not limit the value ranges of the first threshold and the second threshold, which can be freely set according to specific control strategies. Under different control strategies, the first threshold and the second threshold The threshold values are all different. After setting the first threshold and the second threshold, it will automatically judge and automatically switch between the two driving modes according to the judgment result;

The working mode determining unit 201 is configured to determine the working mode of the hybrid power coupling control system according to the states of the brake 13 and the clutch 14 and the comparison result of the comparing unit; specifically, for example, in some embodiments, if it is judged that the SOC value is low If it exceeds the first threshold, it is determined that the working mode is a hybrid driving mode; otherwise, it is determined that the working mode is a pure electric driving mode; for example, in other embodiments, if it is determined that the SOC value is greater than the first threshold, and the current If the vehicle speed is higher than the second threshold, it is determined that the working mode is a pure electric driving mode, otherwise it is determined that the working mode is a hybrid driving mode;

The working mode execution unit 202 is configured to control the closure or position of each element in the hybrid power coupling control system according to the working mode determined by the working mode determination unit, so that the hybrid power coupling mechanism is switched to the working mode ;

The braking mode processing unit 203 is used to control the engine 1 to shut down when the automobile is in a braking state, and control the driving motor 10 to generate braking torque to brake the wheels, and collect the information in the driving motor 10 at the same time The generated induced current charges the power battery.

Specifically, the working mode execution unit 202 performs working mode switching in the following manner:

As shown in Figure 3, when the battery is fully charged, the whole vehicle can run in pure electric mode, and neither the engine nor the generator work. When the determined working mode is the pure electric driving mode, the engine 1 and the generator 6 are controlled to be closed (that is, the engine and the generator are not working), and the driving motor 10 is controlled to output driving force to the wheels 16;

As shown in FIG. 4 , when the determined working mode is the hybrid driving mode, the engine 1 , the generator 6 , and the driving motor 10 are controlled to work, and jointly output driving force to the wheels 16 .

As shown in Figure 5, when the battery power is insufficient, the engine needs to be started by the generator. After the engine is started, the power of the engine is output to the generator to generate electricity, and the vehicle enters the extended-range driving mode; specifically,

When the determined working mode is the range-extended drive mode, control the engine 1 to start, output the power of the engine 1 to the generator 6 to generate electricity, and charge the power battery; control the drive motor 10 to work, The wheels 16 output driving force.

The following table lists the execution parts and usage conditions in the above three driving modes:

Table 1 Comparison Table of Drive Modes, Executing Parts, and Conditions of Use

It can be understood that, according to the working conditions of the whole vehicle, when the vehicle speed is required to be high, the coupling mechanism can be switched to the hybrid driving mode. At this time, the speed can be adjusted through the planetary gear mechanism to optimize the working range of the engine and improve the economic performance of the engine. During the mode switching process, the drive motor will always participate in the drive, and there is no power interruption in the power.

It can be understood that, in terms of power regulation, the hybrid power coupling control system provided by the present invention can effectively supplement the driving power required by the power wheels through the power battery, so as to allocate the power of the internal combustion engine more reasonably, and keep the working state of the internal combustion engine from being affected. Or less affected by road conditions. The internal combustion engine can always work in the optimal state to improve the efficiency of the whole vehicle. At the same time, this system can also recover the kinetic energy during braking and send it back to the power battery. All of these moves drastically improve overall vehicle fuel efficiency.

As shown in Figure 6, it shows a schematic diagram of the main flow of an embodiment of a hybrid power coupling control method provided by the present invention; please also combine it with Figure 7, in this embodiment, the method is applied In the aforementioned hybrid power coupling control system, it includes the following steps:

Step S10, determine the working mode of the hybrid coupling mechanism according to the state of the brake, the clutch, the current battery SOC value or/and the current vehicle speed, and the working mode includes pure electric driving mode, extended range driving mode and hybrid driving mode;

Step S11, switching the hybrid coupling mechanism to the determined working mode;

Step S12, when the car is in the braking state, control the engine to shut down, and control the driving motor to generate braking torque to brake the wheels, and at the same time collect the induced current generated in the driving motor, and send it to the power battery Charge.

Wherein, the step S10 further includes:

Step S100, comparing the current battery SOC value with a first threshold, or/and comparing the current speed of the vehicle with a second threshold;

Step S101, determining the working mode of the hybrid power coupling control system according to the state of the brake and the clutch and the comparison result;

Step S102, according to the determined working mode, control the closure or position of each component in the hybrid power coupling control system, so that the hybrid power coupling mechanism is switched to the working mode; specifically, the step S102 includes:

When the determined working mode is the pure electric driving mode, control the engine and the generator to shut down, and control the driving motor to work to output driving force to the wheels;

When the determined working mode is the hybrid driving mode, the engine, the generator, and the driving motor are controlled to work, and jointly output driving force to the wheels.

When the determined working mode is the extended-range driving mode, control the engine to start, output the power of the engine to the generator to generate electricity, and charge the power battery; control the driving motor to output driving force to the wheels.

For more details, reference may be made to the foregoing descriptions of FIG. 1 to FIG. 4 , and details are not repeated here.

Implementing the embodiment of the present invention has the following beneficial effects:

In the hybrid coupling mechanism provided by the embodiment of the present invention, the engine and the generator are connected through a planetary gear, the speed ratio is adjustable, and the speed ratio range is large, which can reduce the volume of the generator; the drive motor is connected and output through a planetary gear, which can increase The speed ratio of the drive motor is conducive to the high speed of the motor, so that the volume of the motor can be reduced, which is conducive to saving space and light weight;

At the same time, in the hybrid drive mode, the speed can be adjusted through the planetary gear mechanism to optimize the working range of the engine and improve the economic performance of the engine;

In addition, during the mode switching process, the drive motor participates in the drive, and the power will not be interrupted;

Furthermore, in the embodiment of the present invention, only three shaft systems (engine input shaft, intermediate shaft, drive motor input shaft and differential gear shaft) are required, and the structure is compact; and the drive motor can generate braking torque, so in this In the embodiment of the invention, the structure is simple, the control is easy, and the cost is low.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above description is only the specific implementation of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, some improvements and modifications can also be made. It should be regarded as the protection scope of this application.

Claims (11)

1. a kind of hybrid power coupling mechanism, the driving for hybrid vehicle, it is characterised in that including：

Engine（1）；

Damper（2）, it is connected to the engine（1）Output shaft on；

Generator（6）, itself and the engine（1）It is coaxially arranged；

First planet row, for connecting the engine（1）And generator（6）, first planet row includes the first sun gear （3）, the first planet carrier（4）And first ring gear（5）；Wherein, the engine（1）With first planet carrier（4）Connection, The generator（6）With first sun gear（3）Connection；

Brake（13）, the first ring gear with first planet row（5）It is connected；

Clutch（14）, it is arranged at the generator（6）Input shaft on, the brake (13), clutch（14）For work Operation mode switches；

Second planet row, including the second sun gear（7）, the second planet carrier（8）And second ring gear（9）, wherein, described second Planet carrier（8）It is fixed, second sun gear（7）With the first ring gear of first planet row（5）It is meshed；

Drive motor（10）, its input terminal is connected with power battery, its output terminal is by driving motor gear（11）With it is described Second sun gear of the second planet row（7）It is connected；

Differential mechanism（12）, the second ring gear with second planet row（9）It is connected, and and wheel hub（15）It is connected.

2. mechanism as claimed in claim 1, it is characterised in that when needing to be braked, the driving motor（10）Into one Step is used to produce braking moment with brake wheel, and can produce induced electricity and flow to power battery and charge.

3. mechanism as claimed in claim 1, it is characterised in that the operating mode includes pure electric vehicle drive pattern, combined drive Dynamic model formula and increasing journey drive pattern；Wherein, in the brake（13）During disconnection, the hybrid power coupling mechanism is in pure electricity Dynamic drive pattern or combination drive pattern；When the brake（13）With reference to, clutch（14）During disconnection, hybrid power coupling machine Structure, which is in, increases journey drive pattern.

4. a kind of hybrid power coupling control system, the driving for hybrid vehicle, it is characterised in that including hybrid power Coupling mechanism and mode control device, wherein：

The hybrid power coupling mechanism includes：

Engine（1）；

Damper（2）, it is connected to the engine（1）Output shaft on；

Generator（6）, itself and the engine（1）It is coaxially arranged；

First planet row, for connecting the engine（1）And generator（6）, first planet row includes the first sun gear （3）, the first planet carrier（4）And first ring gear（5）；Wherein, the engine（1）With first planet carrier（4）Connection, The generator（6）With first sun gear（3）Connection；

Brake（13）, the first ring gear with first planet row（5）It is connected；

Clutch（14）, it is arranged at the generator（6）Input shaft on, the brake（13）, clutch（14）For work Operation mode switches；

Second planet row, including the second sun gear（7）, the second planet carrier（8）And second ring gear（9）, wherein, described second Planet carrier（8）It is fixed, second sun gear（7）With the first ring gear of first planet row（5）It is meshed；

Drive motor（10）, its input terminal is connected with power battery, its output terminal is by driving motor gear（11）With it is described Second sun gear of the second planet row（7）It is connected；

Differential mechanism（12）, the second ring gear with second planet row（9）It is connected, and is connected with wheel hub；

The mode control device, for according to brake（13）, clutch（14）State, present battery SOC value and/or automobile Current vehicle speed, determines the operating mode of the hybrid power coupling mechanism, and the hybrid power coupling mechanism is switched to institute Definite operating mode, the operating mode include pure electric vehicle drive pattern and combination drive pattern.

5. hybrid power coupling control system as claimed in claim 4, it is characterised in that the mode control device is further Including：

Comparing unit, for by present battery SOC value compared with first threshold, and/or by automobile current vehicle speed and second Threshold value is compared；

Operating mode determination unit, for according to brake（13）, clutch（14）The comparative result of state and comparing unit, Determine the operating mode of the hybrid power coupling control system；

Operating mode execution unit, for the operating mode according to determined by the operating mode determination unit, controls described mixed The closing of each element or position in power coupling control system are closed, the hybrid power coupling mechanism is switched to the Working mould Formula.

6. hybrid power coupling control system as claimed in claim 5, it is characterised in that the operating mode execution unit is specific Operating mode switching is carried out using following manner：

When identified operating mode is pure electric vehicle drive pattern, the engine is controlled（1）, generator（6）Close, control Drive motor（10）Work, to wheel output driving power；

When identified operating mode is combination drive pattern, the engine is controlled（1）, generator（6）, control driving electricity Machine（10）Work, makes the engine（1）With driving motor（10）Jointly to wheel output driving power；

When identified operating mode is increases journey drive pattern, the engine is controlled（1）Start, by the engine (1) Power output give the generator（6）Power generation, charges to power battery；Control the driving motor（10）Work, to Wheel output driving power.

7. hybrid power coupling control system as claimed in claim 5, it is characterised in that the mode control device is further Including braking mode processing unit, for when the automobile is in braking conditions, controlling the engine（1）Close, and control Make the driving motor（10）Braking moment brake wheel is produced, while collects the driving motor（10）In caused sensing Electric current, charges to power battery.

8. a kind of hybrid power coupling control method, couples applied to such as claim 4-7 any one of them hybrid power and controls In system processed, it is characterised in that include the following steps：

Step S10, according to brake, clutch state and present battery SOC value and/or automobile current vehicle speed, determines described The operating mode of hybrid power coupling mechanism, the operating mode include pure electric vehicle drive pattern, increase journey drive pattern and mix Close drive pattern；

Step S11, identified operating mode is switched to by the hybrid power coupling mechanism.

9. method as claimed in claim 8, it is characterised in that the step S10 further comprises：

Step S100, by present battery SOC value compared with first threshold, and/or by automobile current vehicle speed and second threshold It is compared；

Step S101, according to brake, clutch state and comparative result, determines the hybrid power coupling control system Operating mode；

Step S102, according to identified operating mode, controls the closing of each element in the hybrid power coupling control system Or position, the hybrid power coupling mechanism is switched to the operating mode.

10. method as claimed in claim 9, it is characterised in that the step S102 includes：

When identified operating mode is pure electric vehicle drive pattern, the engine, generator is controlled to close, control driving electricity Machine works, to wheel output driving power；

When identified operating mode is combination drive pattern, the engine, generator, control driving motor work are controlled Make, make the engine and driving motor jointly to wheel output driving power；

When identified operating mode is increases journey drive pattern, the engine start is controlled, by the power of the engine Export to the electrical power generators, charge to power battery；The driving motor is controlled to work to wheel output driving power.

11. method as claimed in claim 10, it is characterised in that the method is further included：

When the automobile is in braking conditions, the tail-off is controlled, and controls the driving motor to produce brake force Square brake wheel, while caused sensing electric current in the driving motor is collected, charge to power battery.